Work-holding device



Patented Oct. 3, 1922..

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G.A A. CARLSON. 'wHKHoLmNG nEvrcE. APPLICATION FILED AUG. I9. |920.

G. A. CARLSON. I WORK HOLDING DEVICE. APPLICATION man Aums. 1920."

msnm ot.3,1922..

Patented @et 3, '1922.

GUSTAVE A.. CARLSON, OE DETROT, Iv'ICHGrAN.

WORK-HOLDING DEVICE.

Application filed August 19, 1920.

To all whome' may concern.'

Be it known that l, Grosrnvn A. CARLSON, a citizen oi' the United States of America, residing at Detroit, in the county ot l.Vayne and State of Michigan, have invented cer-- tain new and useful Improvements in Work- Holdino' Devices, of which the following is a speciiication, reference being had therein to the accompanying drawings.

My invention relates to work holding devices for polishing machines, and has for its object the provision of means by which articles of circular cross section may he polished or buied, whether` cylindrical or t`aper ing, even ot considerable length-or disks oi considerable width.

ln the operation of the present device, the work is rotated and reciprocated while in contact with a regular polishing or buiiing wheel of any suitable or well known type. Means are provided for adjustingthe work with relation to the polishing' device and for limiting the extent ot movement as well as the location of the limits oi' the movement while in contact with the polishing means, so that a limited band oi' any desired width may be polished at any point along` cylindri cal or tapered work or on the face of a disk, while of course the entire surface may be polished.

The machine may also be used for small work which may be polished by simple rotation without reciprocation and it is thus adapted for a considerable range of work.

With this device, one workman may oversee the operation of a group of machines, since after the work has been placed in po sition and the work holder adjusted, the pol` ishing operation is continued automatically.

ln the drawings:

Figure 1 is an end elevation of my improved machine;

Fig. 2 is a plan view;

Fig. 3 is a side elevation partly tion;

Fig. 4e is a plan view, partly in section, on the line 4 4 of F 3;

Fig. 5 is a fragmentary plan View, showing the relation of the shaft ano chuck to the buiiing wheel for tapering' work; and Fig. 6 is a similar view of the same parts when disk-like articles areA beingpolished.

I provide a suitable base l'having ways 2 in which a support 3 is mounted for sliding movement. A block l also slidable in ways in secthe base 1.

.23, 24, belt 25, worm 26, and worm gear 2".

serial no. 404,649.

2 may be adjusted longitudinally of the base i by means of a screw 5 and hand wheel 6. This block a is connected to the support 3 by a toggle 7 having a handle member 8. W ith the toggle in the position shown in Fig. 3, adjustment oit' the block l by the screw and hand wheel causes the simultaneous adjustment of the support 3 longitudinally ot A bed 9 is mounted in the support 3 for 65` vertical adjustment by means of the screw 10 and wheel 11. sliding table 12, mounted for reciprocation in ways 13 on thebed 9, has bracket arms 14C, le, extending upward and connected by a transverse plate 15 on which is formed vertical bearing or cylindrical stud 16.

On the stud 16, is a head comprising a standard 17, gear casings 18 and 19, and a bearing 2O for the shaft 21. An electric motor 22 mounted on the gear casing 18, drives the shaft 21 by means of the pulleys A shaft 28 journaled in the standard 17 and stud 16, has at its upper end a worm gear 29 meshing` with a worm 30 mounted'on the shaft 21, and at its lower end is provided with a slotted arm 31. ln the slot 32 oi the arm 3.1 is slidably mounted a crank pin A pitm'an 3st is pivoted at one end on the crank pin 33 and at its other end on the pivot member 35, which is adjustable along the bar 36 secured to the bed 9.

A suitable chuck, shown as comprising' clamping heads 37, 38, mounted on the shaft 21, is used to hold the work 39 securely in place with its axis coinciding with that of the shaft 21, and any suitable securing means, as nut 40, may be used to hold the clamping means in position.

tiny ordinary or well known form ot' `polishingwheel or butiing means iii-1 is mounted onthe support 42, with its axis of revolution substantially parallel with the path of movement of the reciprocating carriage or table 12.

The operation of this device will be evident from the description. When the work is mounted on the shat't 21 by means of the chuck members 37, 38, it may he adjusted in a plane parallel to that in which lies the axis of rotation oit the polishing wheel 41 by the `hand Wheel 11, and in a plane at right angles to the former plane lby the hand wheel 6, these two adjustments making possible the location of the work in the most advantageous position. llllhen the bed 9 is adjusted vertically by the Wheel 11, it may be secured at any point by the set screw 113.

' The horizontal adjustment of the bed ktoward and from the bufting means is made by the hand Wheel 6 acting through screw and block t on the toggle 7 to move the bed along the Ways 2, on its support 3. AfterV the adjustment is made, the toggle may be operated by the handle 8 to Withdraw the Work quickly from the buiiing Wheel and to return the next piece of work to the adjusted position by a rapid movement, Without disturbing the adjustment.

lhen the motor is started, it drives the shaft 21, rotating the Workin contact with the builing Wheel. At the same time, the vertical shaft 28 is rotated by its gear 29 in mesh with the Worm 30, and the crank arm 31 is driven by the shaft 2S. The crank arm 31 is pivoted to the pitman B4, which is pivoted to the member 35 secured to the bar 36. The rotation of the crank arm pivoted to a pitman which is pivoted at its other end to a fixed `pivot results in the reciprocation of the carriage 12 on the Ways 13, Which are set parallel With the shaft on Which the bulfing Wheel is mounted. The Work moves longitudinally' While rotating in contact with the bufling .vheel, and the extent of this longitudinal movement is determined by the adjustment of the crank pin 33 along the crank arm 81 with respect to the axis of the shaft 2S, While the location of the limits of the reciprocating movement may be adjusted by slid-- ing the member along the bar 36 and securing it in adjusted position by means of the set screw all. Thus, a limited band of any desired Width may be polished at any point along the Work, `it being understood that the entire length may bebu'ffed. i

l/Vhen a tapering-pieceof work 39 5), is mounted on the shaft Q1 bythe clamping heads 37, 38, and `nut li-0', the standard 17 is adjusted angularly on the stud 16 to bring the surface of the Work rparallel with the shaft on which the buiiing .Wheel 111' is mounted. The set screw 46 holds the Ahead in the adjusted position, and the table 12 reciprocates parallel to the shaft on Which the bufiing Wheel is mounted, and parallel to the face of the Work as it rotates.

For small Work, Where longitudinal reciprocation is not necessary, the crank pin may be set in line ".vith the shaft 28, orthe pitman maybe disconnected and the table 12 held inplace by' a set screw 45.

After a piece of Work is polished, the support?, kis slid back along the ways :2 by pulling up onthe handle 8 of the toggle, and the removal of the polished vpiece and the placing of the next in position in the chuck is done at a distance from the buffer.

A disk such as 39 in TFig. (i, is mounted with the shaft 21 at right angles to the shaft of the Wheel 11 and reciprocated across the face of the Wheel to polish the entire surface ora band of any Width desired. Any suitable chuck may be used.

I claim:

1. Awork holder for a polishing machine comprising a bed, a carriage mounted for reciprocation on 4the bed, a head mounted on the carriage, a shaft rotatably mounted in the head, a Work-holding chuck on the shaft, and vmeans carried by the head for rotating the shaft and for reciprocating the carriage.

2. structure as defined in claim 1, having means permitting adjustment of the shaft angularly with respect lto the path of reciprocation of ythe carriage.

3. A Work holder for a polishingl machine comprising a base, a support adjustable;I longitudinally of the base, a bed carried by the support, a carriage mounted for reciprocation on the bed, a head on the carriage, a motor on the head, a Ywork-supporting shaft driven by the motor, and means driven by the motor for `reciprocating the carriage.

. structure as defined in claim 3, hava toggle by which the support may be ved to and from its adjusted position.

.il structure as dened in claim 3, havin means permitting angular adjustment of the head with respect to the path of movement of the reciprocating carriage.

6. A Work holder for a polishing machine comprising a bed, a carriage mounted for reciprocation on the bed, a head on the earriage, motor on the head, a shaft having a Work-holding chuck, and a shaft having crank arm, each journaled in the head and rotated by the motor, and a pitman pivcted at one end to the crank arm Aand ai' its other-end to a pivot member mounted on the bed.

7. A structure as defined-in claimi, having means permitting adjustment ofthe shaft having the Work-holding chuck angularly with respect to the path of reciprocation of the carriage.

8. A structure as defined -in claim 6, having means permitting adjustment of the pivot member longitudinally of 'the path of movement of the carriage, whereby the limits of the reciprocating movement of the Work-holding chuck may he adjusted.

In testimony whereof l affix my signature in presence of two Witnesses.

GUSTAVE A. CARLSON.

llitnesses i ARTHUR MINNICK,

H. C. 'UNDnnWoon uo, @Oce as 

